JetBrief No. 393 July 2008

JetBriefLocation: United States of America Service: Crewboat Waterjet Model: HM811

Waterjet Performance Sets New NAME: SEACOR Cheetah (Crewzer Class) SEACOR Cat Among the Pigeons SERVICE: Crewboat / Offshore Supply SEACOR Cheetah is one of the most significant vessels to be launched LENGTH: in 2008, and sets a new benchmark for crewboat performance, efficiency 50.90 metres (167’) BEAM: and versatility. The first of the “Crewzer” class of fast support vessels 11.70 metres (38‘ 6”) was built with a very specific role in mind, and its propulsion set-up of DRAUGHT: four HamiltonJet HM811 waterjets powered by MTU engines provides 2.10 metres (7’) all the power it needs to fulfil that role. CONSTRUCTION: Aluminium The Crewzer Class has been designed a main engine, thruster or generator. to offer the best of both worlds when Capacity: Waterjets were the obvious choice for 150 Tonnes Deck Cargo, it comes to crew transfer operations. this vessel for several reasons. For one, 150 pax, 10 crew High speed and comfortable ride give it the quad HM811 configuration has proven SPEED: the advantage over traditional monohull 42 knots very successful on the Crowther / crewboats, while the ability to carry up WATERJETS: Gulf Craft passenger ferry Key to 150 passengers, 46,000 litres of fuel, Quad HamiltonJet Model HM811 West Express (JB389). The reliability and 13,000 litres of fresh water and 150 ENGINEs: versatility of HamiltonJet waterjets in Quad MTU diesel engines tonnes of deck cargo make it a more monohull crewboats, as well as their high Model 16V 4000 M71, each versatile alternative to helicopters. 2460kW (3305hp) @ 2000rpm speed efficiency, are key requirements Gearboxes: With a passenger-only top speed of 42 for a vessel operating in the highly Twin Disc/Nico MG61242SC knots and 35 knots fully laden, SEACOR competitive oil industry, particularly in 2.17:1 reduction Cheetah is significantly faster than other more remote locations such as off the DESIGNER: crew/supply boats operating today. coast of , where SEACOR Cheetah Incat Crowther, , builder: She utilises trim tabs in an “inertial- is currently operating. Gulf Craft, Patterson, LA, USA control” ride control system to improve HamiltonJet DISTRIBUTOR: performance and passenger comfort Sewart Supply, Morgan City, at speed, and a Kongsberg Dynamic LA, USA Positioning system to assist in fast and safe transfer of crew. The DP-2 system’s computers link engines, waterjets and twin bow-thrusters to maintain vessel position, and do so even with the loss of www.hamiltonjet.co.nz CWF Hamilton & Co Limited, Lunns Road, PO Box 709, Christchurch, . Ph: +64 3 962 0530. Fax: +64 3 962 0534. Email: [email protected]